Leverage Browser Caching

Hello,

I am using the SG Cachepress. I have been running tests on my site speed and I am consistently getting an error telling me to leverage browser caching and then it gives this additional information –
The following cacheable resources have a short freshness lifetime. Specify an expiration at least one week in the future for the following resources

I am also being told – Remove query strings from static resources –

Resources with a “?” in the URL are not cached by some proxy caching servers. Remove the query string and encode the parameters into the URL for the following resources

I thought the SG Cachepress would do these things? Do I need an additional plugin to cache or fix these things? Or is there something in the setup of the SG Cachepress that I can do to make it fix these things?

Casey